Describe current, including its unit of measurement and symbol.

Description should include

differentiating between direct current (DC), alternating current (AC), and pulsating direct current (PDC), including symbols and units of measurement
explaining that current is measured in amperes (amps)
identifying the symbol for current (I)
defining electrical current as the motion of free electrons
explaining the usual sine waveform and periodic changes in direction of alternating current.

Process/Skill Questions: